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Preparation method for high purity tantalum foil for organic light emitting diode (OLED)

A high-purity, tantalum foil technology, used in metal rolling and other directions, can solve the problems of low production efficiency, difficult processing, and unguaranteed product quality, and achieve the effect of low impurity content and high purity

Active Publication Date: 2018-01-23
BAOJI BOXIN METAL MATERIALS
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AI Technical Summary

Problems solved by technology

The base layer of high-purity tantalum foil has the advantages of bright surface, no cracks, no peeling, no folding, no obvious oxidation and no impurities pressed into the defect, etc., but its processing is difficult, the production efficiency is low, the product quality cannot be guaranteed, and it is difficult to mass produce

Method used

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  • Preparation method for high purity tantalum foil for organic light emitting diode (OLED)
  • Preparation method for high purity tantalum foil for organic light emitting diode (OLED)

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Embodiment Construction

[0038] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a high-purity tantalum foil for OLED with impurity content strictly in line with the standard, less structural defects, fine grain structure, high uniformity, and high isotropy of the internal mechanical properties of the plate material. Preparation.

[0039] The technical solution adopted by the present invention to solve technical problems is:

[0040] The method for preparing high-purity tantalum foil for OLED is characterized in that it comprises the following steps:

[0041] Step 1: Prepare materials: select tantalum bars with low niobium and tungsten content and purity ≥ 99.8%;

[0042]Step 2 Furnace loading: clean the furnace, ensure that there are no debris in the vacuum chamber, clean the reactor, avoid pollution, maintain a high-purity environment, and load the furnace with tantalum strips;

[0043] Step 3: Primary smelting: use electron beam furnace for smelting,...

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Abstract

The invention belongs to the manufacturing field of organic light emitting diodes (OLEDs) and relates to an evaporation boat which is used when depositing a metal electrode, in particular to a preparation method for a high purity tantalum foil evaporation boat for OLED. The preparation method includes the steps of material preparing, shove charging, first smelting, vacuum cooling, second smelting,cogging and rolling, tantalum ingot pickling, material preparing, vacuum annealing heat treatment and rolling. By adopting electron-beam smelting, zone melting purification and electromagnetic fieldpurification and controlling melting speed and time precisely, the fact that the tantalum foil is few in impurity content and high in purity is ensured; and through the process of rolling and by conducting high power rolling mill cogging directly, the technological process is simplified and work efficiency is improved. The tantalum foil manufactured by the method is few in structural defects, finein grain structure, high in uniformity and high in isotropy of internal mechanical properties of sheet materials.

Description

technical field [0001] The invention belongs to the field of organic electroluminescent diode (OLED) manufacture and relates to a preparation method of high-purity tantalum foil for OLED. Background technique [0002] Organic light-emitting diodes (OLEDs) are self-illuminating, do not require a backlight source, have high contrast, are thin, have a wide viewing angle, fast response, can be used for flexible panels, have a wide operating temperature range, and are relatively simple in structure and manufacturing process, etc. Excellent characteristics, considered to be the next generation of flat panel display emerging application technology. OLED is composed of a thin and transparent indium tin oxide (ITO) with semiconductor characteristics connected to the positive electrode of the electrode to form an anode; a layer of metal cathode, plus a light-emitting layer between the anode and the metal cathode. Sandwich structure. Among them, the evaporation boat made of tantalum ...

Claims

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Application Information

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IPC IPC(8): C22B34/24C22B9/04C22B9/22B21B1/40C22F1/18C22F1/02
Inventor 韩伟东王玉华
Owner BAOJI BOXIN METAL MATERIALS
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